From patchwork Sun Jan 31 23:32:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 12057805 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0CA53C433E6 for ; Sun, 31 Jan 2021 23:34:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C27A664E2B for ; Sun, 31 Jan 2021 23:34:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229889AbhAaXd6 (ORCPT ); Sun, 31 Jan 2021 18:33:58 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:7248 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229656AbhAaXdx (ORCPT ); Sun, 31 Jan 2021 18:33:53 -0500 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 10VNX9hu103073; Sun, 31 Jan 2021 18:33:09 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding; s=pp1; bh=kv9UZKQxGHcWZCbXo58TjMf1KJPsQMzbU/+ItkdKJwE=; b=YVd62iJYbchCjTIYOS+yehZm7dp+IkQW52C7lD1OhagbWVJN7uOZNU3qKMVD3FxOSyV+ 21DP8O1NpFYxRRAh3DxVl0HxSULjagwLK2QWbqq6ZKf9/RmiZPWVY+HHEVV9CS0wVvqd pE923VUGMICKTOFkwZGcHxBD+VOiaYiQXTmzLFgOU0tlw+yaFxkJTBSbwrGhc4BavGgM sAYMY1QLeOuvwgXL+e1mBXNzvD6TyHmliJWw5kJ3IPoSNH/MWO64BI7t1ANALMVMrwyW n3JzhnwRTDk6+9tFThn+7YW8loQQabXYFJgeZlGkkxO0MQPdl+NGjkpNNjLPfU3zLshO hA== Received: from ppma02wdc.us.ibm.com (aa.5b.37a9.ip4.static.sl-reverse.com [169.55.91.170]) by mx0a-001b2d01.pphosted.com with ESMTP id 36e58b0xd6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 31 Jan 2021 18:33:09 -0500 Received: from pps.filterd (ppma02wdc.us.ibm.com [127.0.0.1]) by ppma02wdc.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 10VNMd5c009297; Sun, 31 Jan 2021 23:33:08 GMT Received: from b03cxnp08025.gho.boulder.ibm.com (b03cxnp08025.gho.boulder.ibm.com [9.17.130.17]) by ppma02wdc.us.ibm.com with ESMTP id 36cy38tht1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 31 Jan 2021 23:33:08 +0000 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 10VNX5Jc24969638 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 31 Jan 2021 23:33:05 GMT Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 40805BE051; Sun, 31 Jan 2021 23:33:05 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BEEB1BE04F; Sun, 31 Jan 2021 23:33:04 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Sun, 31 Jan 2021 23:33:04 +0000 (GMT) From: Stefan Berger To: keyrings@vger.kernel.org, linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org, patrick@puiterwijk.org, linux-integrity@vger.kernel.org, Stefan Berger Subject: [PATCH v6 0/4] Add support for x509 certs with NIST p256 and p192 keys Date: Sun, 31 Jan 2021 18:32:57 -0500 Message-Id: <20210131233301.1301787-1-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.737 definitions=2021-01-31_08:2021-01-29,2021-01-31 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 phishscore=0 clxscore=1015 mlxscore=0 spamscore=0 malwarescore=0 impostorscore=0 suspectscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101310137 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org This series of patches adds support for x509 certificates signed by a CA that uses NIST p256 or p192 keys for signing. It also adds support for certificates where the public key is a NIST p256 or p192 key. The math for ECDSA signature verification is also added. Since self-signed certificates are verified upon loading, the following script can be used for testing: k=$(keyctl newring test @u) while :; do for hash in sha1 sha224 sha256 sha384 sha512; do openssl req \ -x509 \ -${hash} \ -newkey ec \ -pkeyopt ec_paramgen_curve:prime256v1 \ -keyout key.pem \ -days 365 \ -subj '/CN=test' \ -nodes \ -outform der \ -out cert.der keyctl padd asymmetric testkey $k < cert.der if [ $? -ne 0 ]; then echo "ERROR" exit 1 fi done done It also works with restricted keyrings where an RSA key is used to sign a NIST P256/P192 key. Scripts for testing are here: https://github.com/stefanberger/eckey-testing The ECDSA signature verification will be used by IMA Appraisal where ECDSA file signatures stored in RPM packages will use substantially less space than if RSA signatures were to be used. Stefan v5->v6: - moved ecdsa code into its own module ecdsa_generic built from ecdsa.c - added script-generated test vectors for NIST P256 & P192 and all hashes - parsing of OID that contain header with new parse_oid() v4->v5: - registering crypto support under names ecdsa-nist-p256/p192 following Hubert Xu's suggestion in other thread - appended IMA ECDSA support patch v3->v4: - split off of ecdsa crypto part; registering akcipher as "ecdsa" and deriving used curve from digits in parsed key v2->v3: - patch 2 now includes linux/scatterlist.h v1->v2: - using faster vli_sub rather than newly added vli_mod_fast to 'reduce' result - rearranged switch statements to follow after RSA - 3rd patch from 1st posting is now 1st patch Stefan Berger (4): crypto: Add support for ECDSA signature verification x509: Detect sm2 keys by their parameters OID x509: Add support for parsing x509 certs with ECDSA keys ima: Support EC keys for signature verification crypto/Kconfig | 10 + crypto/Makefile | 6 + crypto/asymmetric_keys/public_key.c | 19 ++ crypto/asymmetric_keys/x509_cert_parser.c | 44 ++- crypto/ecc.c | 13 +- crypto/ecc.h | 28 ++ crypto/ecdsa.c | 361 ++++++++++++++++++++++ crypto/ecdsasignature.asn1 | 4 + crypto/testmgr.c | 12 + crypto/testmgr.h | 267 ++++++++++++++++ include/keys/asymmetric-type.h | 6 + include/linux/oid_registry.h | 7 + lib/oid_registry.c | 13 + security/integrity/digsig_asymmetric.c | 29 +- 14 files changed, 790 insertions(+), 29 deletions(-) create mode 100644 crypto/ecdsa.c create mode 100644 crypto/ecdsasignature.asn1